药用级 纯度Purity ≥98.0% (GC) 熔点Melting point 75°C - 79°C 水分Water(by Karl Fischer) 4.5-5.5 % 灼烧残渣Residue on ignition ≤0.1% (as SO4) 氯chloride (Cl-) ≤100 mg/kg 等级quality meets analytical specification of Ph. Eur., BP, NF
外观Appearance 白色粉末、结晶或结晶固体 红外光谱鉴别Infrared spectrometry Conforms 纯度Purity ≥98.0% (GC) 纯度Purity 97.5 - 102.5 % (银量滴定) 水分Water 4.0 - 6.0 % 熔点Melting point 75°C - 79°C
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